US4621971A - Means for rotating tree trunks - Google Patents

Means for rotating tree trunks Download PDF

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Publication number
US4621971A
US4621971A US06/726,234 US72623485A US4621971A US 4621971 A US4621971 A US 4621971A US 72623485 A US72623485 A US 72623485A US 4621971 A US4621971 A US 4621971A
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US
United States
Prior art keywords
log
rotators
tree
longitudinal axis
feeding
Prior art date
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Expired - Fee Related
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US06/726,234
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English (en)
Inventor
Kauko Ratuio
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Individual
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Individual
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Publication of US4621971A publication Critical patent/US4621971A/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
    • B27B31/00—Arrangements for conveying, loading, turning, adjusting, or discharging the log or timber, specially designed for saw mills or sawing machines
    • B27B31/04—Turning equipment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27L—REMOVING BARK OR VESTIGES OF BRANCHES; SPLITTING WOOD; MANUFACTURE OF VENEER, WOODEN STICKS, WOOD SHAVINGS, WOOD FIBRES OR WOOD POWDER
    • B27L1/00—Debarking or removing vestiges of branches from trees or logs; Machines therefor

Definitions

  • the present invention concerns a means for rotating tree trunks or equivalent into correct position regarding their curvature, prior to feeding them into a machine processing round timber.
  • the object of the present invention is to provide a means which, combined e.g. with the means disclosed in the Finnish patent application No. 832798, constitutes a tree feeding means which is more reliable in operation than before and by which the tree trunk can be rotated into desired position, no matter whether the tree trunk is in motion or stationary.
  • the rotating means of the invention is therefore characterized in that the means comprises one or several rotator pairs, each such pair being composed of two rotators disposed in the tree trunk feeding means and provided with helices, said rotators in their operating position being elastically urged against the tree trunk and being arranged to rotate in such manner with reference to each other that the tree trunk therebetween will rotate, forced by the helices, in the desired direction. With the aid of the means, the tree trunk is positively rotated into the desired position.
  • the rotating means of the invention may be used either as an ancillary to another rotating means, to make sure that the desired position is achieved, or as sole rotating means in a tree trunk feeding means.
  • An advantageous embodiment of the invention is characterized in that the number of rotator pairs is one and each of its rotators is provided with an electromotor of its own. This enables the rotators on opposite sides of the tree trunk to be rotated in different directions with reference to each other, which is indispensable if their helices are same-handed.
  • Another advantageous embodiment of the invention is characterized in that the rotators are disposed obliquely in the tree trunk feeding direction so that the helix crests parallel the centre-line of the tree trunk. This is highly important because it allows propagation of the tree trunk while it is being rotated and therefore the rotating does not detract from the feed rate.
  • One more advantageous embodiment of the invention is characterized in that the rotators are pivotally carried at their lower parts so that they can be turned aside if need be.
  • this rotating means according to the present invention is used only as an ancillary or to ensure the turning, the normal position of the rotators is that in which they are apart from the tree trunks. The rotators are only turned against the tree when it is observed that the tree has not turned as desired in the preceding means.
  • Still one advantageous embodiment of the invention is characterized in that the elastic force with which the rotators act on the tree trunk is produced by means of pneumatic cylinders connecting the rotators.
  • the force should be relatively light and elastic so that the tree trunks can move forward even during the rotation.
  • FIG. 1 presents an advantageous embodiment of the invention, in which it is disposed between a tree feeding means and a machine processing the tree.
  • FIG. 2 presents the rotating means of the invention, in end view and partly sectioned.
  • FIG. 1 is presented an important embodiment of the invention in which it is incorporated as a component in a tree feeding means 2.
  • the tree trunk 1 is centred in the lateral and height directions and turned into correct position regarding its curvature, for instance with its back side downwards, prior to being fed into the machine 3 processing timber.
  • a rotating means according to the invention, because it has been found in practice that the tree is not always turned in the desired way by the tree feeding means alone.
  • the invention is used as an ancillary by which the feeding of the tree 1 is interfered with if need be.
  • the rotating means For operating the rotating means, one operator is needed, who watches the feeding of tree trunks 1 into the processing machine 3.
  • the operator turns with the aid of a control handle the pivoted rotators 4 of the rotating means against the tree trunk into the position shown in FIG. 2.
  • the helical parts 6 of the rotators 4 engage elastically with the sides of the tree trunk 1 with the aid of the pneumatic cylinder 5.
  • the tree trunk can then be caused to rotate by setting with the aid of the electromotors 7 the helical parts 6 of the rotators into rotation in the same direction. In spite of the simultaneous rotation, the tree trunk continues its movement all the time towards the processing means 3.
  • Control of the rotators may take place with the aid of a control handle pivotally carried at its lower end, pulling on the handle positioning the rotators in contact with the tree trunk, and vice versa.
  • a control handle pivotally carried at its lower end, pulling on the handle positioning the rotators in contact with the tree trunk, and vice versa.
  • the handle is pulled and at the same time inclined to the right, the rotating movement of the helices is switched on so as to rotate the tree to the right.
  • inclining the handle to the left makes the tree rotate to the left.
  • the handle may be provided with a button on depressing which the feeding means or conveyor comes to a standstill.
  • the motors driving the rotators are not necessarily electrically operated: they may be any motors, for instance hydraulically operated ones. Likewise, there may be more than one rotator pair.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Mechanical Engineering (AREA)
  • Debarking, Splitting, And Disintegration Of Timber (AREA)
  • Milling, Drilling, And Turning Of Wood (AREA)
  • Chemical And Physical Treatments For Wood And The Like (AREA)
US06/726,234 1984-05-03 1985-04-23 Means for rotating tree trunks Expired - Fee Related US4621971A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI841768A FI69585C (fi) 1984-05-03 1984-05-03 Anordning foer vridning av traedstammar
FI841768 1984-05-03

Publications (1)

Publication Number Publication Date
US4621971A true US4621971A (en) 1986-11-11

Family

ID=8519007

Family Applications (1)

Application Number Title Priority Date Filing Date
US06/726,234 Expired - Fee Related US4621971A (en) 1984-05-03 1985-04-23 Means for rotating tree trunks

Country Status (10)

Country Link
US (1) US4621971A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
AT (1) AT396668B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
AU (1) AU580800B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
CA (1) CA1262107A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE (1) DE3513837A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
ES (1) ES8606057A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
FI (1) FI69585C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
FR (1) FR2563762B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
GB (1) GB2158394B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
SE (1) SE458429B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060144675A1 (en) * 2005-01-06 2006-07-06 Mitchell Rory M Conveyor system

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI8843U1 (fi) * 2010-02-05 2010-09-20 Martek Sapientia Oy Puukappaleitten käsittely

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3854614A (en) * 1972-10-05 1974-12-17 Stetson Ross Machine Co Inc Log feeding and turning machine
US3945413A (en) * 1974-03-19 1976-03-23 Bror Evert Eriksson Feeding device
US3981393A (en) * 1974-10-08 1976-09-21 Adco-West Machinery Manufacturing Company Log turning apparatus
SU712248A1 (ru) * 1978-06-26 1980-01-30 Уральский лесотехнический институт Протаскивающее устройство дл сучкорезной машины
SU814827A1 (ru) * 1978-06-02 1981-03-23 Производственное Деревообрабатывающееобъединение "Витебскдрев" Министерствалесной И Деревообрабатывающейпромышленности Белорусской Ccp Устройство дл разворота бревен
US4365704A (en) * 1979-10-29 1982-12-28 Stenvall Carl Johan Log alignment apparatus

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3587685A (en) * 1968-11-05 1971-06-28 Morbark Ind Inc Apparatus and methods for debarking logs
SE390266B (sv) * 1973-08-08 1976-12-13 Kockums Ind Ab Rundvridare
DE3228224C2 (de) * 1982-07-28 1986-04-03 Maschinenfabrik Esterer AG, 8262 Altötting Vorrichtung zum Zuführen von Holz
DE8518093U1 (de) * 1985-06-21 1985-12-19 Gebr. Jäckle GmbH Maschinen- & Gerätebau, 7709 Hilzingen Vorrichtung zum Wenden eines Baumstammes

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3854614A (en) * 1972-10-05 1974-12-17 Stetson Ross Machine Co Inc Log feeding and turning machine
US3945413A (en) * 1974-03-19 1976-03-23 Bror Evert Eriksson Feeding device
US3981393A (en) * 1974-10-08 1976-09-21 Adco-West Machinery Manufacturing Company Log turning apparatus
SU814827A1 (ru) * 1978-06-02 1981-03-23 Производственное Деревообрабатывающееобъединение "Витебскдрев" Министерствалесной И Деревообрабатывающейпромышленности Белорусской Ccp Устройство дл разворота бревен
SU712248A1 (ru) * 1978-06-26 1980-01-30 Уральский лесотехнический институт Протаскивающее устройство дл сучкорезной машины
US4365704A (en) * 1979-10-29 1982-12-28 Stenvall Carl Johan Log alignment apparatus

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060144675A1 (en) * 2005-01-06 2006-07-06 Mitchell Rory M Conveyor system
US7631748B2 (en) * 2005-01-06 2009-12-15 Usnr/Kockums Cancar Company Conveyor system
US20100044187A1 (en) * 2005-01-06 2010-02-25 Mitchell Rory M Conveyor system
US8205739B2 (en) 2005-01-06 2012-06-26 Usnr/Kockums Cancar Company Conveyor system

Also Published As

Publication number Publication date
CA1262107A (en) 1989-10-03
SE8502137L (sv) 1985-11-04
AU4846285A (en) 1987-04-16
FI841768A0 (fi) 1984-05-03
FI69585C (fi) 1986-03-10
FR2563762A1 (fr) 1985-11-08
DE3513837A1 (de) 1985-11-07
GB8511141D0 (en) 1985-06-12
FR2563762B1 (fr) 1992-01-10
AT396668B (de) 1993-11-25
AU580800B2 (en) 1989-02-02
ATA116285A (de) 1993-03-15
FI69585B (fi) 1985-11-29
SE458429B (sv) 1989-04-03
ES542769A0 (es) 1986-04-16
SE8502137D0 (sv) 1985-05-02
GB2158394A (en) 1985-11-13
GB2158394B (en) 1987-10-21
ES8606057A1 (es) 1986-04-16
DE3513837C2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1993-04-01

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